Abstract
A multi‐component substitution of Co and Ni was incorporated into ZnTiO3 to form pure hexagonal Zn1−x(Co1/2Ni1/2)xTiO3 (x=0,0.8,0.9,1.0) dielectric ceramic powders by a modified sol–gel route, following heat treatments at 600°C for 3 h and at 800°C for 6 h. Differential scanning calorimetry measurements revealed that the order of increasing thermal stability of solid solution compound Zn1−x(Co1/2Ni1/2)xTiO3 was ZnTiO3 (945°C), Zn0.1Ni0.9TiO3 (1346°C), Zn0.1(Co1/2Ni1/2)0.9TiO3 (1390°C), and Zn0.1Co0.9TiO3 (>1400°C). Both the dielectric constant and loss tangent reached a maximum at x=0.8 and then decreased with solubility, x, and measurement frequency.
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